HP BMW Z4 update
#38490 from Bryce McGuire · Rule change · TB 25-07 (2025-07 Fastrack)
In EP Spec Lines, BMW Z4 (03-05), add to Notes the following:
“52mm Flat Plate Intake Restrictor.”
BoP Lab / Road America
40 laps are left out as timing errors (far too short to be a lap of this track). The rest of those sessions, sectors included, is used.
| Pos | Car | Driver | Class | # | Best lap | Best theoretical lap | Best qual lap | Best race lap | Best trap speed | Best S1 | Best S2 | Best S3 | Best S4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Austin-Healey Sprite | Tom Tuttle | HP | 11, 11x | 2:33.498 C-P3 | 2:33.311 | 130.9 C-P3 | 44.166 C-P3 | 58.663 C-P3 | 29.647 C-P3 | 20.835 C-P3 | ||
| 2 | Triumph Spitfire (1975) | Steve Sargis | HP | 18 | 2:37.567 B-Q2 | 2:36.504 | 2:37.567 B-Q2 | 2:38.036 A-R | 124.3 D-R1 | 45.353 D-R1 | 59.393 A-R | 30.507 B-Q2 | 21.251 A-R |
| 3 | Mazda 2 (2011) | Jesse Prather | HP | 34 | 2:38.405 A-R | 2:37.923 | 2:39.609 A-Q3 | 2:38.405 A-R | 124.3 C-R | 45.901 A-R | 59.659 A-R | 30.748 C-R | 21.615 A-Q3 |
| 4 | Volkswagen Jetta 1780 (1990) | Chris Schaafsma 2+ cars | HP | 23 | 2:38.539 A-R | 2:37.632 | 2:39.406 A-Q3 | 2:38.539 A-R | 124.9 C-R | 45.754 A-R | 59.795 A-R | 30.443 A-R | 21.640 A-R |
| 5 | Volkswagen Rabbit (1984) | Chuck Mathis | HP | 54 | 2:38.937 C-R | 2:38.529 | 2:38.976 C-Q1 | 2:38.937 C-R | 121.9 C-R | 46.122 C-R | 1:00.159 C-Q1 | 30.660 C-R | 21.588 C-Q1 |
| 6 | Fiat X 1/9 (1980) | Matt Brannon | HP | 22 | 2:40.444 C-R | 2:39.795 | 2:40.723 C-Q1 | 2:40.444 C-R | 122.1 C-R | 46.648 D-R1 | 1:00.516 C-Q1 | 30.959 C-R | 21.672 C-Q1 |
| 7 | Fiat X 1/9 (1980) | Brayden Connolly | HP | 12, 12x | 2:40.631 C-R | 2:40.024 | 2:42.510 C-Q1 | 2:40.631 C-R | 122.7 C-R | 46.378 C-R | 1:00.709 C-R | 31.006 C-R | 21.931 A-R |
| 8 | Volkswagen GLI | Chris Schaafsma 2+ cars | HP | 23 | 2:41.468 B-R1 | 2:41.175 | 2:42.681 B-Q2 | 2:41.468 B-R1 | 121.1 B-Q2 | 46.791 B-R2 | 1:01.221 B-R1 | 31.515 B-R2 | 21.648 B-R1 |
| 9 | Honda Civic Si (1984) | Greg Gauper | HP | 15 | 2:42.568 C-R | 2:41.455 | 2:43.244 C-Q1 | 2:42.568 C-R | 120.7 C-R | 46.910 B-R2 | 1:01.157 A-R | 31.474 C-R | 21.914 B-R2 |
| 10 | Volkswagen Golf (1985) | Angus Crome | HP | 42 | 2:42.613 A-R | 2:41.432 | 2:42.967 C-Q1 | 2:42.613 A-R | 121.9 C-R | 47.054 A-R | 1:00.867 C-R | 31.294 C-R | 22.217 C-Q1 |
| 11 | Volkswagen Golf (1986) | Brooke Fairbanks | HP | 20 | 2:42.865 A-R | 2:42.178 | 2:52.331 A-Q3 | 2:42.865 A-R | 118.9 A-R | 47.120 A-R | 1:01.561 A-R | 31.354 A-R | 22.143 A-R |
| 12 | Honda CR-X Si (1986) | William Lamkin | HP | 86 | 2:44.083 C-Q1 | 2:43.421 | 2:44.083 C-Q1 | 116.5 C-P1 | 47.589 C-P2 | 1:01.367 C-Q1 | 32.194 C-Q1 | 22.271 C-Q1 | |
| 13 | Volkswagen Golf (1985) | Chris W Albin | HP | 3 | 2:44.218 A-R | 2:43.794 | 2:47.095 A-Q3 | 2:44.218 A-R | 117.0 A-R | 47.911 A-Q3, A-R | 1:01.325 A-R | 32.291 A-R | 22.267 A-R |
| 14 | Volkswagen Golf (1985) | Ralf Lindow | HP | 53 | 2:44.751 C-Q1 | 2:44.078 | 2:44.751 C-Q1 | 2:45.648 C-R | 120.0 C-R | 47.879 C-Q1 | 1:01.569 C-Q1 | 32.161 C-R | 22.469 C-Q1 |
| 15 | Mini Cooper (2002) | Robert Bax | HP | 33 | 2:45.095 B-R2 | 2:44.711 | 2:47.146 B-Q2 | 2:45.095 B-R2 | 117.1 B-R2 | 47.728 B-R2 | 1:02.308 B-R2 | 32.373 B-R1 | 22.302 B-R1 |
| 16 | Austin-Healey Sprite (1976) | Kendall Jones 2+ cars | HP | 80 | 2:46.104 C-R | 2:44.969 | 2:47.829 C-Q2 | 2:46.104 C-R | 117.4 C-R | 48.293 C-R | 1:02.266 C-R | 31.893 C-R | 22.517 C-R |
| 17 | Honda Civic (1986) | Enrik Benazic | HP | 111, 11 | 2:46.775 C-R | 2:45.669 | 2:47.320 C-Q1 | 2:46.775 C-R | 119.6 C-R | 48.001 C-R | 1:02.572 C-R | 32.501 C-Q2 | 22.595 C-Q1 |
| 18 | Triumph Spitfire (1962) | Andrew Wright | HP | 07 | 2:47.841 C-R | 2:47.239 | 2:48.306 C-Q1 | 2:47.841 C-R | 115.7 C-R | 48.443 C-P2 | 1:03.525 C-R | 32.465 C-Q1 | 22.806 C-Q1 |
| 19 | Volkswagen Scirocco | William Trainer 2+ cars | HP | 7 | 2:48.685 D-R1 | 2:47.586 | 2:48.685 D-R1 | 116.5 D-R1 | 48.329 D-R1 | 1:03.582 D-R1 | 32.562 D-R1 | 23.113 D-R1 | |
| 20 | MG Midget (1976) | Kendall Jones 2+ cars | HP | 80 | 2:49.247 A-Q3 | 2:49.247 | 2:49.247 A-Q3 | 2:50.662 A-R | 112.7 A-R | 49.715 A-Q3 | 1:03.262 A-Q3 | 32.910 A-Q3 | 23.360 A-Q3 |
| 21 | Toyota Yaris (2012) | Tom Broring | HP | 5 | 2:49.874 C-R | 2:48.881 | 2:51.679 C-Q2 | 2:49.874 C-R | 119.1 A-R | 49.478 A-R | 1:03.531 C-R | 33.050 C-R | 22.822 A-R |
| 22 | Austin-Healey Sprite (1962) | Jerry Oleson | HP | 81 | 2:50.878 A-R | 2:50.878 | 3:51.799 A-Q2 | 2:50.878 A-R | 113.3 A-R | 49.638 A-R | 1:03.823 A-R | 33.768 A-R | 23.649 A-R |
| 23 | Volkswagen Scirocco (1976) | Joe Camilleri | HP | 06 | 2:52.280 C-Q1 | 2:51.829 | 2:52.280 C-Q1 | 111.6 C-P2 | 50.290 C-P2 | 1:04.829 C-Q1 | 33.396 C-Q1 | 23.314 C-P2 | |
| 24 | Mini Cooper (2004) | Leanna Wright | HP | 02 | 2:52.934 C-R | 2:52.119 | 2:53.008 C-Q1 | 2:52.934 C-R | 112.1 C-Q2, C-R | 50.280 C-Q2 | 1:04.984 C-R | 33.563 C-R | 23.292 C-Q1 |
| 25 | Volkswagen Rabbit (1984) | Ray Elliott | HP | 13 | 2:55.874 B-R1 | 2:54.729 | 3:00.864 B-Q2 | 2:55.874 B-R1 | 110.6 B-Q2, B-R1 | 51.316 B-R1 | 1:05.478 B-R1 | 34.047 B-R1 | 23.888 B-R1 |
| 26 | Mini Cooper | Jacob Clark | HP | 27 | 2:55.979 D-R1 | 2:55.689 | 3:55.585 B-Q1 | 2:55.979 D-R1 | 108.3 D-R1 | 51.068 D-R1 | 1:05.948 D-R1 | 34.716 D-R1 | 23.957 D-R1 |
| 27 | Honda CR-X (1989) | Robert E Horrell_Jr >115% | HP | 91 | 3:00.565 C-Q2> | 2:59.754> | 3:00.565 C-Q2> | 117.2 C-Q2> | 51.072 C-Q2> | 1:09.269 C-Q2> | 35.001 C-Q2> | 24.412 C-Q2> | |
| 28 | Volkswagen Golf | William Trainer 2+ cars >115% | HP | 97 | 3:02.495 B-R2> | 3:01.331> | 3:39.815 B-Q1> | 3:02.495 B-R2> | 108.6 B-R2> | 51.926 B-R1> | 1:08.991 B-R2> | 35.962 B-R1> | 24.452 B-R1> |
| 29 | Nissan PL510 (1970) | R Paul Evans >115% | HP | 27 | 3:03.749 C-P1> | 2:59.782> | 106.0 C-P1> | 50.297 C-P1> | 1:09.747 C-P1> | 36.046 C-P1> | 23.692 C-P1> |
One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in; the fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed, marked ">" (with ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors
- S1 SF → I4AT 1.26 mi
- S2 I4AT → I11 1.65 mi
- S3 I11 → I13AB 0.57 mi
- S4 I13AB → SF 0.57 mi
- SF Spd SF → SFT 0.02 mi
- Spd I4AT → I4A 0.02 mi
Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
By car
| Car | Class | Drivers | Best lap | Best qual | Best race | Best trap | Best S1 | Best S2 | Best S3 | Best S4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Austin-Healey Sprite | HP | 3 | 2:33.498Tom Tuttle | 2:47.829Kendall Jones | 2:46.104Kendall Jones | 130.9Tom Tuttle | 44.166Tom Tuttle | 58.663Tom Tuttle | 29.647Tom Tuttle | 20.835Tom Tuttle |
| Austin-Healey Sprite | HP | 1 | 2:33.498Tom Tuttle | 130.9Tom Tuttle | 44.166Tom Tuttle | 58.663Tom Tuttle | 29.647Tom Tuttle | 20.835Tom Tuttle | ||
| Austin-Healey Sprite (1976) | HP | 1 | 2:46.104Kendall Jones | 2:47.829Kendall Jones | 2:46.104Kendall Jones | 117.4Kendall Jones | 48.293Kendall Jones | 1:02.266Kendall Jones | 31.893Kendall Jones | 22.517Kendall Jones |
| Austin-Healey Sprite (1962) | HP | 1 | 2:50.878Jerry Oleson | 3:51.799Jerry Oleson | 2:50.878Jerry Oleson | 113.3Jerry Oleson | 49.638Jerry Oleson | 1:03.823Jerry Oleson | 33.768Jerry Oleson | 23.649Jerry Oleson |
| Triumph Spitfire | HP | 2 | 2:37.567Steve Sargis | 2:37.567Steve Sargis | 2:38.036Steve Sargis | 124.3Steve Sargis | 45.353Steve Sargis | 59.393Steve Sargis | 30.507Steve Sargis | 21.251Steve Sargis |
| Triumph Spitfire (1975) | HP | 1 | 2:37.567Steve Sargis | 2:37.567Steve Sargis | 2:38.036Steve Sargis | 124.3Steve Sargis | 45.353Steve Sargis | 59.393Steve Sargis | 30.507Steve Sargis | 21.251Steve Sargis |
| Triumph Spitfire (1962) | HP | 1 | 2:47.841Andrew Wright | 2:48.306Andrew Wright | 2:47.841Andrew Wright | 115.7Andrew Wright | 48.443Andrew Wright | 1:03.525Andrew Wright | 32.465Andrew Wright | 22.806Andrew Wright |
| Mazda 2 | HP | 1 | 2:38.405Jesse Prather | 2:39.609Jesse Prather | 2:38.405Jesse Prather | 124.3Jesse Prather | 45.901Jesse Prather | 59.659Jesse Prather | 30.748Jesse Prather | 21.615Jesse Prather |
| Volkswagen Jetta | HP | 1 | 2:38.539Chris Schaafsma | 2:39.406Chris Schaafsma | 2:38.539Chris Schaafsma | 124.9Chris Schaafsma | 45.754Chris Schaafsma | 59.795Chris Schaafsma | 30.443Chris Schaafsma | 21.640Chris Schaafsma |
| Volkswagen Rabbit | HP | 2 | 2:38.937Chuck Mathis | 2:38.976Chuck Mathis | 2:38.937Chuck Mathis | 121.9Chuck Mathis | 46.122Chuck Mathis | 1:00.159Chuck Mathis | 30.660Chuck Mathis | 21.588Chuck Mathis |
| Fiat X-1/9 | HP | 2 | 2:40.444Matt Brannon | 2:40.723Matt Brannon | 2:40.444Matt Brannon | 122.7Brayden Connolly | 46.378Brayden Connolly | 1:00.516Matt Brannon | 30.959Matt Brannon | 21.672Matt Brannon |
| Volkswagen GLI | HP | 1 | 2:41.468Chris Schaafsma | 2:42.681Chris Schaafsma | 2:41.468Chris Schaafsma | 121.1Chris Schaafsma | 46.791Chris Schaafsma | 1:01.221Chris Schaafsma | 31.515Chris Schaafsma | 21.648Chris Schaafsma |
| Honda Civic Si | HP | 2 | 2:42.568Greg Gauper | 2:43.244Greg Gauper | 2:42.568Greg Gauper | 120.7Greg Gauper | 46.910Greg Gauper | 1:01.157Greg Gauper | 31.474Greg Gauper | 21.914Greg Gauper |
| Honda Civic Si (1984) | HP | 1 | 2:42.568Greg Gauper | 2:43.244Greg Gauper | 2:42.568Greg Gauper | 120.7Greg Gauper | 46.910Greg Gauper | 1:01.157Greg Gauper | 31.474Greg Gauper | 21.914Greg Gauper |
| Honda Civic (1986) | HP | 1 | 2:46.775Enrik Benazic | 2:47.320Enrik Benazic | 2:46.775Enrik Benazic | 119.6Enrik Benazic | 48.001Enrik Benazic | 1:02.572Enrik Benazic | 32.501Enrik Benazic | 22.595Enrik Benazic |
| Volkswagen Golf | HP | 5 | 2:42.613Angus Crome | 2:42.967Angus Crome | 2:42.613Angus Crome | 121.9Angus Crome | 47.054Angus Crome | 1:00.867Angus Crome | 31.294Angus Crome | 22.143Brooke Fairbanks |
| Volkswagen Golf (1985) | HP | 3 | 2:42.613Angus Crome | 2:42.967Angus Crome | 2:42.613Angus Crome | 121.9Angus Crome | 47.054Angus Crome | 1:00.867Angus Crome | 31.294Angus Crome | 22.217Angus Crome |
| Volkswagen Golf (1986) | HP | 1 | 2:42.865Brooke Fairbanks | 2:52.331Brooke Fairbanks | 2:42.865Brooke Fairbanks | 118.9Brooke Fairbanks | 47.120Brooke Fairbanks | 1:01.561Brooke Fairbanks | 31.354Brooke Fairbanks | 22.143Brooke Fairbanks |
| Volkswagen Golf | HP | 1 | 3:02.495William Trainer | 3:39.815William Trainer | 3:02.495William Trainer | 108.6William Trainer | 51.926William Trainer | 1:08.991William Trainer | 35.962William Trainer | 24.452William Trainer |
| Honda CR-X Si | HP | 2 | 2:44.083William Lamkin | 2:44.083William Lamkin | 117.2Robert E Horrell_Jr | 47.589William Lamkin | 1:01.367William Lamkin | 32.194William Lamkin | 22.271William Lamkin | |
| Honda CR-X Si (1986) | HP | 1 | 2:44.083William Lamkin | 2:44.083William Lamkin | 116.5William Lamkin | 47.589William Lamkin | 1:01.367William Lamkin | 32.194William Lamkin | 22.271William Lamkin | |
| Honda CR-X (1989) | HP | 1 | 3:00.565Robert E Horrell_Jr | 3:00.565Robert E Horrell_Jr | 117.2Robert E Horrell_Jr | 51.072Robert E Horrell_Jr | 1:09.269Robert E Horrell_Jr | 35.001Robert E Horrell_Jr | 24.412Robert E Horrell_Jr | |
| Mini Cooper | HP | 3 | 2:45.095Robert Bax | 2:47.146Robert Bax | 2:45.095Robert Bax | 117.1Robert Bax | 47.728Robert Bax | 1:02.308Robert Bax | 32.373Robert Bax | 22.302Robert Bax |
| Mini Cooper (2002) | HP | 1 | 2:45.095Robert Bax | 2:47.146Robert Bax | 2:45.095Robert Bax | 117.1Robert Bax | 47.728Robert Bax | 1:02.308Robert Bax | 32.373Robert Bax | 22.302Robert Bax |
| Mini Cooper (2004) | HP | 1 | 2:52.934Leanna Wright | 2:53.008Leanna Wright | 2:52.934Leanna Wright | 112.1Leanna Wright | 50.280Leanna Wright | 1:04.984Leanna Wright | 33.563Leanna Wright | 23.292Leanna Wright |
| Mini Cooper | HP | 1 | 2:55.979Jacob Clark | 3:55.585Jacob Clark | 2:55.979Jacob Clark | 108.3Jacob Clark | 51.068Jacob Clark | 1:05.948Jacob Clark | 34.716Jacob Clark | 23.957Jacob Clark |
| Volkswagen Scirocco | HP | 2 | 2:48.685William Trainer | 2:52.280Joe Camilleri | 2:48.685William Trainer | 116.5William Trainer | 48.329William Trainer | 1:03.582William Trainer | 32.562William Trainer | 23.113William Trainer |
| Volkswagen Scirocco | HP | 1 | 2:48.685William Trainer | 2:48.685William Trainer | 116.5William Trainer | 48.329William Trainer | 1:03.582William Trainer | 32.562William Trainer | 23.113William Trainer | |
| Volkswagen Scirocco (1976) | HP | 1 | 2:52.280Joe Camilleri | 2:52.280Joe Camilleri | 111.6Joe Camilleri | 50.290Joe Camilleri | 1:04.829Joe Camilleri | 33.396Joe Camilleri | 23.314Joe Camilleri | |
| MG Midget | HP | 1 | 2:49.247Kendall Jones | 2:49.247Kendall Jones | 2:50.662Kendall Jones | 112.7Kendall Jones | 49.715Kendall Jones | 1:03.262Kendall Jones | 32.910Kendall Jones | 23.360Kendall Jones |
| Toyota Yaris | HP | 1 | 2:49.874Tom Broring | 2:51.679Tom Broring | 2:49.874Tom Broring | 119.1Tom Broring | 49.478Tom Broring | 1:03.531Tom Broring | 33.050Tom Broring | 22.822Tom Broring |
| Nissan PL510 | HP | 1 | 3:03.749R Paul Evans | 106.0R Paul Evans | 50.297R Paul Evans | 1:09.747R Paul Evans | 36.046R Paul Evans | 23.692R Paul Evans |
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
Rule changes between these events
June Sprints 2025 → Runoffs 2025 2025-06-06 to 2025-09-29
HP EP Fiat 124 Spider Competition Adjustment Request
#38498 from John Baucom · Rule change · TB 25-07 (2025-07 Fastrack)
In EP Spec Lines, Fiat 124 Sport Spider 1600 & 124 Spider 2000, change as follows:
Weight: "2050 2000"
Carburetor No. & Type: "(2) Weber 40 IDF-40IFI, (2) Solex C40P116, 34 36mm choke(s) req’d, (2) Weber 45DCOE w/ 34 36 mm
choke(s) on I.R. manifold or fuel injection."
Runoffs 2025 → June Sprints 2026 2025-09-29 to 2026-06-05
HP HP Plymouth Arrow spec omission
#38995 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In HP Spec Lines, Plymouth Arrow (76-80), add the following wording to Trans. Speeds(max):
"4 or 5"
HP Add Wheel Diameter to Appendix G
#39008 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In Appendix G.2.3, change as follows:
"Rim width and diameter are is absolute maximums."
HP Add TB ID tolerance to general Prod rules
#39009 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In GCR, Section 9.1.5.E., change as follows:
9.1.5.E.1.b.4: "The inside dimensions of the throttle body casting/housing (as measured at the throttle butterfly) must remain
stock (tolerance of +/-.25mm), but the throttle body can otherwise be ported and polished."
9.1.5.E.2.b.4: "The inside dimensions of the throttle body casting/housing and all dimensions of the throttle butterfly must
remain stock (tolerance of +/-.25mm)."
HP Please Lower Weight of 280Z
#38871 from Matthew Miller · Rule change · TB 25-09 (2025-09 Fastrack)
In EP Spec Lines, Nissan 280Z, change Weight (lbs) as follows:
"(Effective 11/1/2025) 2560 2400
*2624 2460
**2688 2520"
HP Miata Weight Adjustment Follow Up
#38949 from Don Tucker · Rule change · TB 25-10 (2025-10 Fastrack)
In EP Spec Lines, Mazda MX-5 / Miata 1.8L (90-97), Effective 11/1/2025 make the following weight change:
"2150 2125"
HP Weight Break for 1098 Midget / Sprite
#38970 from Kendall Jones · Rule change · TB 25-10 (2025-10 Fastrack)
In HP Spec Lines, Austin-Healey Sprite/Midget 1098cc, Effective 11/1/2025make the following weight change:
"1630 1550"
HP HP Volvo 142 spec omission
#38994 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In HP Spec Lines, Volvo 142/142E P-1800 Engine, Effective 11/1/2025 add the following wording to Notes:
"Comp. Ratio limited to 12.0:1. Valve lift limited to .425”."
HP HP Mini DOHC 1.6
#38996 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe), Effective 11/1/2025 make the following
changes to the Notes:
"Compression ratio limited to 11.0:1, Valve lift limited to .450”.390"."
HP Add to Rabbit description
#39019 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)
In FP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit (Includes Convertible Cabriolet)"
In HP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit 1588 (Includes Cabriolet)"
"Volkswagen Rabbit 1715 (Includes Cabriolet)"
"Volkswagen Rabbit 1780 (Includes Cabriolet)"
HP Clean-up 9.1.5.E.7e
#39025 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)
In GCR, Section 9.1.5.E.7., change as follows:
"e. Cars fitted with rear drum brakes, can convert to rear disc brakes without penalty. Note that the “Brakes Std.” and “BrakesAlt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to reardisc brakes under this rule. When converting from rear drum brakes to rear disc brakes:
1. Rear brake rotors must be solid and can be no larger in diameter than the largest permitted front brake rotor, as defined on
the vehicle’s spec line.
2. Rear calipers and mounting brackets are unrestricted but must be made of a ferrous or aluminum material. The standard andalternate brake listings on a vehicle’s specification line, does not prohibit a car that was fitted with rear drum brakes as stock
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from converting to rear disc brakes under this rule.
3. The “Brakes Std.” and “Brakes Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes
as stock from converting to rear disc brakes under this rule."
HP Add TB size to Ford Mustang (94-98) Spec Line
#39130 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)
In EP Spec Lines, Ford Mustang (94-98) add the following to the Fuel Injected Equipped Throttle Body Inside Diameter column:
"60"
HP Request to Re-Classsify Datsun SPL-311 to HP from FP
#39116 from Robert Heatwole · Rule change · TB 25-12 (2025-12 Fastrack)
In HP Spec Lines, classify Nissan/Datsun SPL 311 as follows:
A specification table follows in the original; it is not shown here.
HP TR2 Notes E&O
#39180 from Anthony Parker · Rule change · TB 25-12 (2025-12 Fastrack)
In EP Spec Lines, Triumph TR2, 3, 3A, 4, 4A, TR4, TR4A, IRS, make the following change to the Notes:
"Front apron assembly may be made of alternate material. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990lbs. Laycock overdrive, may use 5 speed gearbox without overdrive."
HP Balance of Power
#39187 from Jim Simaras · Rule change · TB 25-12 (2025-12 Fastrack)
In EP Spec Lines, make the following changes to Restrictors:
BMW Z3 2.5L: "52mm 50mm Flat Plate Intake Restrictor"
BMW Z3 2.8L (97-00): "55mm 53mm Flat Plate Intake Restrictor"
BMW 328i/is E36 (96-99): "58mm 55mm Flat Plate Intake Restrictor"
BMW 328i/ci E46 (01-06): "58mm 55mm Flat Plate Intake Restrictor"
BMW 325i/is (E46) (01-06): "56mm 53mm Flat Plate Intake Restrictor"
BMW 325is M-Technic (1994): "56mm 53mm Flat Plate Intake Restrictor"
BMW 325i/is E-36 (92-95): "56mm 53mm Flat Plate Intake Restrictor"
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In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"2500 2550
*2563 2614
**2625 2678"
HP Alternative BOP Request for 84-87 Honda CRX/Civic
#39223 from Bill Lamkin · Rule change · TB 25-12 (2025-12 Fastrack)
In HP Spec Lines, change Wheels as follows:
Honda Civic: "13 x 6 7"
Honda Civic DX (92-95): "13 x 6 7"
Honda Civic/Si (84-87): "13 x 6 7"
Honda Civic 1.5 (88-91): "13 x 6 7"
Honda CRX/Si (84-87): "13 x 6 7"
Honda CRX 1.5(88-91): "13 x 67"
HP E/O: Improve Consistency of the Spec Lines
#39500 from Robert Bax · Rule change · TB 26-01 (2026-01 Fastrack)
In HP Spec Line, Toyota MR-2 1.6L (85-89), change Comp. Ratio as follows:
"11.0:1"
HP Request to Reclassify BMW 2002 Into H Production
#39567 from Jonathan Kinberg · Rule change · TB 26-01 (2026-01 Fastrack)
In HP Spec Lines, classify BMW 2002, as follows:
A specification table follows in the original; it is not shown here.
HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1
#39589 from Neil Verity · Rule change · TB 26-02 (2026-02 Fastrack)
In HP Spec Lines, make the following spec line changes:
Triumph Spitfire:
Carburetion
"Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
Comp. ratio 11.0 12.0:1, Valve lift .450”
Trans. Speeds: 4"
Triumph Spitfire Mk. III & IV 1500:
Carburetion
Show 5 more lines
"1300 Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
1500 Valves: (I) 36.6/(1.44) (E) 29.7/(1.17)
1300: Comp. ratio 12.0:1, Valve lift .450”
1500: Comp. ratio 11.0:1, Valve lift .450”
Trans. Speeds: 4"
HP Clarification On Oil Cooler Ducting
#39604 from Chuck Allard · Rule change · TB 26-03 (2026-03 Fastrack)
In GCR, Section 9.1.5.E.6.g.4, add the following:
"On mid and rear engine cars, a single inlet hole may be cut in the front bodywork and a single outlet hole may be cut in the front
trunk floor or a wheel well, for the sole purpose of ducting air to a single engine oil cooler. The size of these holes may be no
larger than the area of the oil cooler itself."
HP Honda Fit 2015-19 Error in Engine Classification
#39853 from Jose Fabian · Rule change · TB 26-03 (2026-03 Fastrack)
In HP Spec Lines, Honda Fit (15-19), change Engine Type Mat’l Block/Head as follows:
"4 Cyl. SOHC DOHC"
HP Miata track width - errors and omissions
#39976 from Production Committee · Rule change · TB 26-05 (2026-05 Fastrack)
In EP Spec Lines, Mazda MX-5 / Miata (94-97), change Track (F/R) mm/(in.) as follows:
Track (F/R) mm/(in.): "1483/1509 (58.4/59.4) 1516/1534(59.7/60.4)"
HP Triumph GT6 Spec Change.
#40098 from Anthony Parker · Rule change · TB 26-05 (2026-05 Fastrack)
In EP Spec Lines, Triumph GT6, change the "Drivetrain Notes" as follows:
"(2) auto-type w/44 45mm choke(s)"
HP Request to Classify BMW E21 320i
#40110 from Doug DeRonne · Rule change · TB 26-05 (2026-05 Fastrack)
In HP Spec Lines, classify BMW 320i/is (E21) (80-83) as follows:
HP BMW 318is 84-85 engine displacement correction
#40116 from Production Committee · Rule change · TB 26-05 (2026-05 Fastrack)
In HP Spec Lines, BMW 318i/is E30 (84-85), change Displacement Bore x Stroke mm/ (in.) as follows:
"1797 1767 89.0 x 71.0 (3.50x2.80)"
HP Austin Healy Sprite/ MG Midget 1275 Induction Change Request
#40213 from Michael MILLER · Rule change · TB 26-06 (2026-06 Fastrack)
In HP Spec Lines, Austin-Healey Sprite Mk I, II, III, IV MG Midget Mk I, II, III, IV & 1500, change Drivetrain Notes as follows:
"(2) 1.25” SU w/ no modifications
(2) 1.5” SU w/ no modifications (on alternate manifold)
Valves: (I) 33.0/(1.30) (E) 29.5/(1.16)
Comp. ratio 12.0:1, Valve lift .450”
Trans. Speeds: 4
Drivetrain Level 2 preparation only.
Listed spec line weight does not change with alternate or stock transmission.
Show 10 more lines
Alternate intake manifold, with narrowed balance tube to fit 1275cc head, permitted with use of 1.5” SU carbs (original P/N’s
12H708, 12H1398, 12H2568)."
In HP Spec Lines, Austin-Healey Sprite Mk I, II, III, IV MG Midget (ALL), change Drivetrain Notes as follows:
"(2) 1.25” SU w/ no modifications
(2) 1.5” SU w/ no modifications (on alternate manifold)
Valves: (I) 33.0/(1.30) (E) 29.5/(1.16)
Comp. ratio 12.0:1, Valve lift .450”
Trans. Speeds: 4
Alternate intake manifold, with narrowed balance tube to fit 1275cc head, permitted with use of 1.5” SU carbs (original P/N’s
12H708, 12H1398, 12H2568)."
June Sprints 2026 → Runoffs 2026 2026-06-05 to 2026-09-28
HP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7
#40322 from Thomas Beverly · Rule change · TB 26-07 (2026-07 Fastrack)
In HP, classify Honda Civic CX/DX/LX (96-00):
HP 1275 Midget/Sprit Alternate intake manifold E/O
#40370 from Production Committee · Rule change · TB 26-07 (2026-07 Fastrack)
In HP Spec Lines, Austin-Healey Sprite Mk I, II, III, IV MG Midget Mk I, II, III, IV & 1500, change Drivetrain Notes as follows:
"(2) 1.25” SU w/ no modifications
(2) 1.5” SU w/ no modifications (on alternate manifold)
Valves: (I) 33.0/(1.30) (E) 29.5/(1.16)
Comp. ratio 12.0:1, Valve lift .450”
Trans. Speeds: 4
Drivetrain Level 2 preparation only.
Listed spec line weight does not change with alternate or stock transmission.
A specification table follows in the original; it is not shown here.
HP HP Honda Civic (92-95)
#40464 from Production Committee · Rule change · TB 26-07 (2026-07 Fastrack)
In HP, make the following changes to the "Honda Civic DX (92-95)" spec line:
Spec Line Name: "Honda Civic DX/LX (92-95)"
Wheels: "13x7 15x7"
Wheelbase: "2/ 4 door: 2621/(103.2) 2/3 door: 2573/(101.3)"
Weight: "2420 2350"
HP Mini Cooper Compression Ratio
#40517 from Brian Linn · Rule change · TB 26-08 (2026-08 Fastrack)
In HP Spec Lines, Mini Cooper (02-06) (includes 05-08 convertible), change Drivetrain Notes as follows:
"Comp. ratio 10.6 11.0:1, Valve lift .450”
Applies to Mini Cooper on this page: Robert Bax, Leanna Wright, Jacob Clark
What the rules allowed changed as listed; this does not say what any particular car ran.